US3585624A - Feeler-controlled stop motion device - Google Patents

Feeler-controlled stop motion device Download PDF

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Publication number
US3585624A
US3585624A US877628A US3585624DA US3585624A US 3585624 A US3585624 A US 3585624A US 877628 A US877628 A US 877628A US 3585624D A US3585624D A US 3585624DA US 3585624 A US3585624 A US 3585624A
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US
United States
Prior art keywords
feeler
casing
thyristor
stop motion
motion device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US877628A
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English (en)
Inventor
Gernot Gottschall
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Franz Morat GmbH
Original Assignee
Franz Morat GmbH
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Filing date
Publication date
Application filed by Franz Morat GmbH filed Critical Franz Morat GmbH
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Publication of US3585624A publication Critical patent/US3585624A/en
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/10—Indicating, warning, or safety devices, e.g. stop motions
    • D04B35/18—Indicating, warning, or safety devices, e.g. stop motions responsive to breakage, misplacement, or malfunctioning of knitting instruments

Definitions

  • Apparatus according to the prior art serving this purpose is complicated and requires'manual assembly so that the cost of devices, according to the prior art, is high. Furthermore, the circuit of the device consists of many connected parts which due to the vibrations of the machine, become loose so that complete reliability of the device, according to the prior art, is not assured.
  • Related object of the invention is to flt all circuit parts ofthe device into a small casing from which a feeler projects.
  • Another object of the invention is to provide the feeler-controlled shockproo f stop motion device.
  • Another object of the invention is to provide a feeler-controlled shockproof stop motion device with a circuit plate with attached conductors so that no manual connections have to be made.
  • one embodiment of the invention comprises a hollow insulating casing preferably molded of an epoxy resin; a circuit plate including an insulating plate diametrically positioned in the interior of the casing at one end of the same, and conductor means secured to the insulating plate; a thyristor and resistor means mounted in the casing between the same and the circuit plate and being connected by the conductor means; a signal lamp fitted into the other end of the casing and having a first terminal adjacent the inner end ofthe contact plate and connected with the conductor means; a contact pin passing through a wall of the casing and having an inner end in contact with the second terminal of the signal lamp, and an outer end adapted to be connected with a voltage source; a contact ring surrounding the casing connected with said conductor means, and adapted to be engaged by a metal part of a machine supporting the casing; and a conductive feeler means secured to the end of the casing adjacent the circuit place and being connected with the conductor means.
  • the conductor means which are permanently attached to the insulating plate, connect the thyristor, the resistor means, the lamp, the contact ring, and the feeler means in such a circuit that the thyristor is fired and generates a current for stopping the machine and for illuminating the lamp when the feeler means engages an improperly placed latch of a needle ofthe knitting machine, or other metal part.
  • the contact ring is in contact with a grounded metal part of the machine, and one terminal of the voltage source is also connected to ground.
  • the other terminal of the voltage source is connected through the signal lamp with the cathode of the thyristor.
  • the current flowing through the conductive thyristor also flows through a relay which operates a relay contact disconnecting the motor of the machine when an improperly placed needle latch is sensed by the feeler.
  • the lamp, the thyristor, two resistors, a capacitor, and the circuit plate are preferably embedded in a cylindrical casing consisting of an epoxy resin such as Araldit.
  • a screw supporting a resilient wire feeler projects from one end of a casing,
  • the device is in conductive connection with a conductor of the circuit plate. Due to the fact that the electrical elements of the device are embedded in a cast casing consisting of an insulating material, not only the cost of manufacturing is low, but the device is also shockproof, and the electric and electronic components are reliably insulated.
  • one resistor and a capacitor are located on one side of the circuit plate, and another resistor and the thyristor are located on the other side of the circuit plate which diametrically extends through a cylindrical casing so that the availa ble space in the interior of the same is'fully used.
  • FIG. 1 is a fragmentary side view illustrating the device of the invention sensing a needle which is in a desired condition
  • FIG. 2 is a fragmentary axial sectional view illustrating a portion of the circular knitting machine provided with a device according to the invention sensing an improperly placed latch ofa cylinder needle;
  • FIG. 3 is a diagram illustrating the electric circuit of the device
  • FIG. 4 is a longitudinal sectional view of the device taken in the direction of the arrow IV in FIG. 6;
  • FIG. 5 is an axial sectional view of the device taken in the direction of the arrow V.
  • FIG. 6 is a cross-sectional view of the device taken on line VI-Vl in FIGS. 4 and 5.
  • FIG. 2 shows, by way of example, a circular knitting machine with a rotating needle cylinder 2 and a cam box 21 provided with cams 20 forming a cam track for the butt of a cylinder needle 1 which is guided in a peripheral axially extending channel of knitting cylinder 2 so that needle I is raised and lowered in accordance with the shape of the stationary cam track of cam box 21.
  • FIGS. l and 2 show the needle in the highest knit position in which the latch 1a must be opened so that a new thread can be caught by the hook lb.
  • cylinder needle 1 is in the correct position, and a feeler 4 of the device D is passed by the needle without being deflected or engaged, since the hook lb is open.
  • the latch 1a is in improper position, partly closing hook lb which would cause fault in the knitted material.
  • the improperly placed latch la moving with cylinder needle 1 and needle cylinder 2 along a circular path, engages feeler 4, which is resilient, and displaces the same until latch 1a has I passed the feeler 4 which returns resiliently to its normal position.
  • the device D is shown to cooperate with a cylinder needle, it will be understood that the device can be used for dial needles, for other types of circular knitting machines, flatbed knitting machines, needles which are operated by jacks, or any other machine employing a latch needle.
  • the device D has a casing 26, a supporting leg 29, and a base with a bore through which a screw 3a passes for securing the device to the cam box or other stationary part of the machine.
  • the device D must be positioned so that the feeler 4 is located in the opening of hook lb, and displaced by a partly closed latch la.
  • a voltage source preferably having 24 v., is connected to a signal lamp Ll, which is connected with a resistor R1, the cathode of a thyristor TH, and a capacitor C1.
  • the other end of resistor R1 is connected with the gate T of the thyristor, and with a second resistor R2 which is connected with the feeler 4.
  • the anode of the thyristor and the other side of capacitor C1 are connected via relay 7 and switch 8 with a contact 27 which is connected to ground.
  • resistors RI and R2 divide the voltage so that a small pulse flows through the resistor R1 to the gate T of thyristor Th to ground at 27.
  • the pulse is insufficient to operate the relay by which the motor 9 of the machine is disconnected, but fires thyristor Th so that a strong current flows through signal lamp Ll, the cathode'and anode of the thyristor, and to ground, and this current also flows through the relay 7 whose contact 7a disconnects the motor.
  • a manually operated switch 8 is also connected in series with the thyristor, and is normally closed. When the machine is stopped, the switch 8 is operated so that the main circuit of the thyristor is interrupted, and the thyristor remains nonconducting ready for the next operation, after the switch has been manually released and returned by a spring to the closed position.
  • a substantially cylindrical casing 26 cast of an epoxy resin
  • a circuit plate 25 is diametrically inserted into the lower end of casing 26, as best seen in FIG. 6, while a lamp Ll having two terminals 30 is embedded in the upper end of the casing.
  • a contact pin 28 which is connected with the voltage source, penetrates the wall of casing 26 and is in contact with one of the terminals 30 of the lamp, as also shown in FIG. 3.
  • the lower ends of terminals 30 abut the upper edge of the insulating plate 25b, and since terminals 30 are embedded in the resin, longitudinal movement of the circuit plate 25 and lamp L1 is not possible.
  • Projections 25a of insulator plate are laterally abutting on terminals 30 further securing the lamp Ll.
  • Circuit plate has a plurality of conductors secured to one side, as best seen in FIG. 4, and other conductors passing through holes in the insulating plate 25b to the other side.
  • a conductor 4l is in contact with the other terminal of lamp L1, and has an arm 42 connected with capacitor C1, and an end portion connected with a conductor 43 passing through the insulating plate 25!; and being connected with the cathode K of the thyristor Th which is located on the other side of the insulator plate 25!).
  • the other end of resistor R1 is connected by a conductor 44 to a conductor 44a passing through a hole in insulator plate 25b and being connected with resistor R2.
  • the center part of conductor 44 is connected with a conductor passing through the insulator plate and being connected with the gate T of the thyristor.
  • resistor R2 is connected with a conductor 45 by a conductor passing through a hole in the insulating plate 25b, and also connected to a screw 31 inserted into the lower end of casing 26.
  • Feeler 4 has a coiled portion wound about screw 31 and ending in a free part which is adapted to sense the position of an improperly placed latch la, as explained with reference to FIG. 2.
  • a conductor 46 has a portion 46b connected by a conductor passing through insulating plate 25b with the anode A of the thyristor,'and is connected by a conductor 46a passing through theinsulating plate 2512 with theother side of capacitor C1.
  • the main portion of conductor 46 passes through the wall of casing 26 and is connected with a contact ring 27 surrounding the casing 26 and being embedded in the same.
  • Contact ring 27 can be connected to ground by an annular metal part of the machine in which casing 26 is secured by screws, not shown, engaging contact ring 27.
  • a support pin 29 consisting of an insulating material, or being insulated from the conductive parts of the device, is embedded in the casing 26 and projects from the same, and may also be used for handling or supporting the device.
  • F eeler-controlled stop motion device comprising, in combination, a hollow substantially cylindrical insulating casing; a circuit plate including an insulating plate diametrically positioned in the interior of said casing at one end of the same, and conductor means secured to said insulating plate; a thyristor and resistor means mounted in said casing between the same and said circuit plate and being connected by said conductor means; a signal lamp fitted into the other end of said casing and having a first terminal adjacent the inner end of said circuit plate and connected with said conductor means, and a second terminal; a contact pin passing through a wall of said casing and having an inner end in contact with said second terminal, and an outer end adapted to be connected with a voltage source; a contact ring surrounding said casing connected with said conductor means, and adapted to be engaged by a metal part of a machine supporting said casing; and a conductive feeler means secured to said one end of said casing projecting from the same and being connected with said conductor means, said conductor means connecting
  • said conductor means connect the cathode and anode of said thyristor in series with said terminals of said lamp; wherein said resistor means include a first resistor and a second resistor having connected ends; wherein said conductor means connect the connected ends of said first and second resistors with the gate of said thyristor, and the other ends of said first and second resistors with said feeler means and said cathode of said thyristor, respectively.
  • Peeler-controlled stop motion device as claimed in claim 2 comprising a capacitor mounted between said casing and said circuit plate; and wherein said conductor means connect said capacitor in parallel with said thyristor.
  • peeler-controlled stop motion device as claimed in claim 3 wherein one of said resistors and said capacitor are located on one side of said circuit plate, and the other resistor and said thyristor are located on the other side of said circuit plate; and wherein said conductor means include conductors secured to a surface of said insulating plate, and other conductors passing through said insulating plate.
  • peeler-controlled stop motion device as claimed in claim 1 wherein said insulating casing consists of a molded epoxy resin in which said contact ring, said insulating plate, and said terminals of said lamp are embedded.
  • peeler-controlled stop motion device as claimed in claim 1 wherein said feeler means includes a screw threaded into the end wall of said casing at said one end ofthe same and in contact with said conductor means, and a partly coiled conductive feeler mounted on said screw and being resiliently deflected when engaging the improperly placed moving part of the machine.
  • Peeler-controlled stop motion device as claimed in claim 1 in combination with a source of voltage having one terminal connected with said contact pin, and the other terminal connected to ground.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
US877628A 1968-11-20 1969-11-18 Feeler-controlled stop motion device Expired - Lifetime US3585624A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE6807789U DE6807789U (de) 1968-11-20 1968-11-20 Von den zungen der zungennadeln einer strickmaschine steuerbare vorrichtung zum stillsetzen derselben

Publications (1)

Publication Number Publication Date
US3585624A true US3585624A (en) 1971-06-15

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ID=6595917

Family Applications (1)

Application Number Title Priority Date Filing Date
US877628A Expired - Lifetime US3585624A (en) 1968-11-20 1969-11-18 Feeler-controlled stop motion device

Country Status (8)

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US (1) US3585624A (enrdf_load_stackoverflow)
BE (1) BE735984A (enrdf_load_stackoverflow)
CH (1) CH492056A (enrdf_load_stackoverflow)
DE (1) DE6807789U (enrdf_load_stackoverflow)
ES (1) ES373456A1 (enrdf_load_stackoverflow)
FR (1) FR1600184A (enrdf_load_stackoverflow)
GB (1) GB1252828A (enrdf_load_stackoverflow)
NL (1) NL6917522A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906752A (en) * 1974-03-07 1975-09-23 Peter C Eichhorst Latch detector stop motion system for circular knitting machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906752A (en) * 1974-03-07 1975-09-23 Peter C Eichhorst Latch detector stop motion system for circular knitting machines

Also Published As

Publication number Publication date
DE6807789U (de) 1969-03-27
NL6917522A (enrdf_load_stackoverflow) 1970-05-22
ES373456A1 (es) 1972-01-16
CH492056A (de) 1970-06-15
GB1252828A (enrdf_load_stackoverflow) 1971-11-10
BE735984A (enrdf_load_stackoverflow) 1969-12-16
FR1600184A (enrdf_load_stackoverflow) 1970-08-28

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